The 88 "family"  Guns using the early 88×571R mm cartridge 8.8 cm Flak 18 New semi-automatic breech, high velocity gun. Entered production in Germany in 1933. Used the Sonderanhänger 201 trailer. Weight 7 tonnes. Rate of fire 15 to 20 rounds per minute. Later, fitted with a gun shield to protect the crew when engaging ground targets. Produced by Krupp. Mod 1938 II: Approximately 50 guns modified so a single man could adjust elevation and traverse. 8.8 cm Flak 36 Entered service 1936–37. It used the redesigned trailer Sonderanhänger 202 enabling faster time to action from the move. The SdAnh 202 had twin wheels on two similar carriages. Could engage ground targets from its traveling position. Weight 7 tonnes. Rate of fire 15 to 20 rounds per minute. Produced by Krupp. Later, fitted with a shield to protect the crew when engaging ground targets. 8.8 cm KwK 36: Main gun of the PzKw VI Ausf. E (Tiger I) tank. Despite its designation, some classify it as a parallel development with very similar specifications rather than a derivative of the Flak 36. 8.8 cm Flak 37: An updated version of the Flak 36, the main difference being Übertragungser 37 (a data transmission system). Produced by Krupp.  Guns using the 88×855R mm cartridge 8.8 cm Flak 41: A gun developed and produced by Rheinmetall-Borsig. A 71 caliber barrel and a 855 mm cartridge case. Fitted to the existing Sonderanhänger 202 as standard. Entered service 1943.  Guns using the 88×822R mm cartridge 8.8 cm Gerät 42: a new Krupp design to compete with Flak 41; did not enter service as an anti-aircraft gun. Further development of the weapon led to the Pak 43 anti-tank gun. 8.8 cm Pak 43: Anti-tank model developed from Krupp's 8.8 cm Gerät 42. New gun carriage, the Sonderanhänger 204. Developed by Krupp and manufactured in different versions, including KwK 43, by at least Dortmund Hoerder-Hüttenverein, Henschel, Weserhütte and Fr. Garny. A 71 caliber barrel and a 822 mm cartridge case. 8.8 cm Pak 43/41: Pak 43 mounted on single axle split-trail field gun carriage produced as a stop-gap measure due to scarcity of materials. Weight 4.9 tonnes. 8.8 cm Pak 43/1: Pak 43 as mounted in the Nashorn tank destroyer. 8.8 cm Pak 43/2 Pak 43 as mounted in the Ferdinand/Elefant tank destroyer. On occasion referred to as "StuK 43/1". 8.8 cm Pak 43/3 and 43/4: Pak 43 as mounted in the Jagdpanther tank destroyer. Falling wedge breech block. 8.8 cm KwK 43: Pak 43 modified as a tank gun. Main gun of the Tiger II heavy tank. Falling wedge breech block.